EMPLOYEE BENEFITS (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Total recognized in other Comprehensive (income) loss	$ 5,945	$ 26,163	$ (23,689)
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Net (gain) loss arising during period	9,543	30,044	(20,977)
Amortization of transition asset	258	286	272
Amortization of prior service credit	318	808	393
Other (gain) loss	0	0	0
Amortization of (loss)	(3,289)	(2,539)	(3,452)
Foreign currency exchange impact	(835)	(2,503)	268
Total recognized in other Comprehensive (income) loss	5,995	26,096	(23,496)
Net recognized in net periodic benefit cost and other comprehensive (income) loss	8,017	27,496	(21,392)
Other Postretirement Benefit Plan [Member]
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Net (gain) loss arising during period	(100)	10	(452)
Amortization of transition asset	0	0	0
Amortization of prior service credit	0	0	254
Other (gain) loss	0	0	0
Amortization of (loss)	51	57	5
Foreign currency exchange impact	0	0	0
Total recognized in other Comprehensive (income) loss	(49)	67	(193)
Net recognized in net periodic benefit cost and other comprehensive (income) loss	$ (14)	$ 108	$ (342)